Work your way up. Have mean illustration skills. Know the graphics programs inside-out. Keep up with trends. Do small projects for friends, students, ULB, etc. to get a current portfolio. Most of that will be low-to-no pay for a while - maybe even a long time. But if you have excellent skills, produce outstanding work, have a good reputation, etc. then you *might* score a gig for one of Disney's smaller companies.